In January 2016, there were 118,907 vehicles registered with the DC DMV at 89,871 residential addresses, according to data provided in a recent FOIA request.

Keep in mind that this does not include any vehicles that residents are using that they have not registered with the DC DMV.

Here is the breakdown of how many households owned one, versus, two, versus 3 vehicles, etc:

## 
##     1     2     3     4     5     6     7     8     9    10    11    12    22 
## 68096 16761  3566   981   295    95    41    16     8     9     1     1     1

And here is that same breakdown in percentage terms:

## 
##        1        2        3        4        5        6        7        8 
## 75.77083 18.65007  3.96791  1.09156  0.32825  0.10571  0.04562  0.01780 
##        9       10       11       12       22 
##  0.00890  0.01001  0.00111  0.00111  0.00111

According to this FOIA’d data, here is the number of cars registered in each SMD.

Here is the number of vehicles registered as a percentage of the number of households in the tract in 2020.

We can also correlate median household income in each tract in the 2019-2023 5-year American Community Survey with our “# vehicles / # households” statistic. When we do this, we find that every $25,000 increase in tract median income is associated with a 7 percentage point increase in our vehicles-per-household metric.